package com.lsh.netty.time;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.ChannelOption;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.SocketChannel;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.LineBasedFrameDecoder;
import io.netty.handler.codec.string.StringDecoder;

/**
 * @author ：LiuShihao
 * @date ：Created in 2021/3/17 12:09 下午
 * @desc ：基于Netty的TimeClient
 * 2021年04月05日15:07:56 支持TCP粘包
 */
public class TimeClient {

    public void connect (int port,String host) throws Exception{
        //配置客户端NIO线程组
        NioEventLoopGroup group = new NioEventLoopGroup();

        try{
            Bootstrap b = new Bootstrap();
            b.group(group).channel(NioSocketChannel.class)
                    .option(ChannelOption.TCP_NODELAY,true)
                    .handler(new ChannelInitializer<SocketChannel>() {
                        @Override
                        protected void initChannel(SocketChannel socketChannel) throws Exception {
                            socketChannel.pipeline().addLast(new LineBasedFrameDecoder(1024));
                            socketChannel.pipeline().addLast(new StringDecoder());
                            socketChannel.pipeline().addLast(new TimeClientHandler());
                        }
                    });
            //发起异步连接操作
            ChannelFuture f = b.connect(host, port).sync();

            //等待客户端链路关闭
            f.channel().closeFuture().sync();

        }finally {

            //优雅退出 释放NIO线程组

            group.shutdownGracefully();

        }

    }

    public static void main(String[] args) throws Exception {
        int port = 8080;
        new TimeClient().connect(port,"127.0.0.1");
    }
}
